align the buffer

src/FxEngine/zbuffer.c

@@ -26,6 +26,20 @@ static const uint32_t size_char = size_uint32*sizeof(int32_t);
 static int32_t* address=0;
 
 const int32_t clearval=3000;
+
+#define ALIGN 4
+static void* buffer_malloc(uint32_t size)
+{
+    void *mem = malloc(size+ALIGN+sizeof(void*));
+    void **ptr = (void**)((uintptr_t)(mem+ALIGN+sizeof(void*)) & ~(ALIGN-1));
+    ptr[-1] = mem;
+    return ptr;
+}
+void aligned_free(void *ptr) 
+{
+    free(((void**)ptr)[-1]);
+}
+
 void FE_zbuffer_clear()
 {
     if (address==0)